单选题
2.
The people at the party were worried about Mary because no one was aware______she had gone.
A、
where that
B、
of the place where
C、
of where
D、
of what
【正确答案】
C
【答案解析】
wh-从句可直接跟在介词后面作宾语。但要注意用正常语序，不用倒装结构。
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